Polycarbonate resin, production method for same, and molded article comprising same
The polycarbonate resin of the present invention comprises: a repeating unit represented by formula 1 of claim 1 ; and a repeating unit represented by formula 2 of claim 1 . The polycarbonate resin has excellent scratch resistance, transparency and tensile elongation.
1. A polycarbonate resin comprising a repeat unit represented by Formula 1; and a repeat unit represented by Formula 2:
wherein in Formula 2, Q is a substituted or unsubstituted C5 to C10 cyclic alkylene group, and a and b are each independently an integer from 0 to 4.
2. The polycarbonate resin according to claim 1 , wherein the repeat unit represented by Formula 1 is present in an amount of about 5 mol % to about 95 mol %, and the repeat unit represented by Formula 2 is present in an amount of about 5 mol % to about 95 mol %.
3. The polycarbonate resin according to claim 1 , wherein the polycarbonate resin further comprises a repeat unit represented by Formula 3:
wherein in Formula 3, A is a single bond, a substituted or unsubstituted C1 to C30 hydrocarbon group, an O or S-containing C1 to C30 hydrocarbon group, a halogen acid ester group, a carbonic acid ester group, CO, S or SO 2 ; R 1 and R 2 are each independently a substituted or unsubstituted C1 to C6 alkyl group; and m and n are each independently an integer from 0 to 4.
4. The polycarbonate resin according to claim 3 , wherein the repeat unit represented by Formula 3 is present in an amount of about 0.01 to about 250 parts by mole based on 100 parts by mole of the repeat units represented by Formulae 1 and 2.
5. The polycarbonate resin according to claim 1 , wherein the polycarbonate resin has a scratch width of about 310 μm or shorter, as measured by a ball-type scratch profile (BSP) test.
6. The polycarbonate resin according to claim 1 , wherein the polycarbonate resin has a tensile elongation of about 40% to about 100% at 25° C.
7. The polycarbonate resin according to claim 1 , wherein the polycarbonate resin has a pencil hardness of F or higher.
8. A method of preparing a polycarbonate resin comprising:
reacting a carbonate precursor with a diol mixture containing a diol represented by Formula 4 and a diol represented by Formula 5:
wherein in Formula 5, Q is a substituted or unsubstituted C5 to C10 cyclic alkylene group, and a and b are each independently an integer from 0 to 4.
9. The method of preparing a polycarbonate resin according to claim 8 , wherein the diol represented by Formula 4 is present in an amount of about 5 mol % to about 95 mol % in the entire diol mixture, and the diol represented by Formula 5 is present in an amount of about 5 mol % to about 95 mol % in the entire diol mixture.
10. The method of preparing a polycarbonate resin according to claim 8 , wherein the diol mixture further comprises an aromatic dihydroxy compound represented by Formula 6:
wherein in Formula 6, A is a single bond, a substituted or unsubstituted C1 to C30 hydrocarbon group, an O or S-containing C1 to C30 hydrocarbon group, a halogen acid ester group, a carbonic acid ester group, CO, S or SO 2 ; R 1 and R 2 are each independently a substituted or unsubstituted C1 to C6 alkyl group; and m and n are each independently an integer from 0 to 4.
11. The method of preparing a polycarbonate resin according to claim 10 , wherein the aromatic dihydroxy compound represented by Formula 6 is present in an amount of about 0.01 to about 250 parts by mole based on 100 parts by mole of the diols represented by Formulae 4 and 5.
12. A molded article comprising the polycarbonate resin according to claim 1 .